Also, a homeless person with a scabby dog on the end of a piece of string, often selling 'the big issue' (transatlantic cousins- don't even ask!) I have heard reffered to in the West Country as a 'Pickey'. Pronounced Piekey.
I don't think this is very polite though, probably not very P.C. I prefer 'person of no fixed abode', which is what I will be if I don't get off this site and finish my prep for the meeting I have tommorow!
'Bum' is nowadays an acceptable term for one's backside, but I remember years ago my father having a fit if my sister and I refferred to it as that, and had we had to say 'bottom'. My father also insisted that we refferred to the Pub as 'the pint shop' , but I think that this was more to protect himself from those essays you used to have to write at school about 'what we did at the weekend'. I think it made it look a lot better to say we spent the weekend at the 'pint shop' rather than the pub!!!!! He tried so damn hard to be middle class, ha ha, bless him.